Πλοήγηση ανά Θέμα "Carbon dioxide"
Αποτελέσματα 21-35 από 35
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Input on the Measurement and Comprehension of CO2 Solubility in Molten Alkali Carbonates in View of Its Valorization
(2020)As the capture and valorization of CO2 in molten carbonates is nowadays becoming a strategic energy topic, the need of accurate solubility measurements of such molecule is becoming compulsory. This study provides a new set ... -
Investigation of a Ba0.5Sr0.5Co0.8Fe0.2O3-δ based cathode SOFC. II. The effect of CO2 on the chemical stability
(2007)The effect of carbon dioxide on the chemical stability of a Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode in the real reaction environment at 450 °C was investigated by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy ... -
Lateral motion and interaction of gas bubbles growing over spherical and plate heaters
(2006)This work investigates the motion of CO2 bubbles emerging in n-heptane when a heat pulse given to a submerged heater creates local supersaturation. The ensuing slow diffusion-induced bubble expansion makes bubble motion ... -
Measuring the Effect of Economic Growth on Countries’ Environmental Efficiency: A Conditional Directional Distance Function Approach
(2017)Using a recently developed probabilistic approach of a conditional directional distance function, we measure the effect of economic growth on countries’ environmental efficiency in carbon dioxide emissions for a sample of ... -
Non‐parametric computational measures for the analysis of resource productivity
(2021)In this study, we assumed that 28 European countries (Decision Making Units (DMUs)) aimed to accomplish higher economic outputs, using fewer resources and producing fewer emissions in the form of environmental degradation. ... -
A novel NiFe@NC-functionalized N-doped carbon microtubule network derived from biomass as a highly efficient 3D free-standing cathode for Li-CO2 batteries
(2019)Rechargeable Li-CO2 batteries, which utilize CO2 into electrochemical energy storage systems, provide a promising strategy for alleviating the greenhouse effect and developing high energy density second batteries. However, ... -
Numerical and experimental assessment of the airflow field and ventilation rates in a naturally ventilated free cubical cattle house with large openings
(2013)An efficient natural ventilation system in dairy cattle buildings is essential both for animal welfare and for environmental issues since the naturally ventilated livestock buildings are a major source of greenhouse gas ... -
Polyatomic thermal creep flows through long microchannels at large temperature ratios
(2019)Rarefied polyatomic gas flows through long microchannels of circular cross section due to small temperature and pressure gradients have been studied on the basis of the Rykov model in a wide range of the gas rarefaction ... -
A printed-circuit heat exchanger consideration by exploiting an Al2O3-water nanofluid: Effect of the nanoparticles interfacial layer on heat transfer
(2021)Supercritical carbon dioxide (S-CO2) Brayton cycle is an encouraging power conversion technology pertaining to waste heat recovery applications, because of the high compactness and efficiency it presents. A key technological ... -
Recuperators investigation for high temperature supercritical carbon dioxide power generation cycles
(2017)Supercritical carbon dioxide (s-CO2) Brayton cycles are a promising technology for the next generation power conversion cycles, attaining equivalent or higher cycle efficiency compared to conventional power cycles at similar ... -
Study of the products distribution during a direct ethanol PEM fuel cell operation
(2011)In the present work the effect of both cell discharge current and operating temperature on (a) the ethanol conversion, (b) the reaction products distribution and (c) the reaction yield towards each released product, during ... -
Surface characteristics investigation of 3D-printed PET-G plates during CO2 laser cutting
(2022)This study investigates the influence of the stand-off distance (SoD), laser speed (LS) and laser power (LP) on kerf geometry (upper width Wu, down width Wd and kerf angle KA) and mean surface roughness (Ra) during CO2 ... -
Sustainable solutions for reducing air-conditioning costs and tailpipe emissions from heavy-duty transportation across Europe
(2022)Heavy-duty trucks emit >25% of the CO2 of the European road transport sector despite representing ≈2.5% of its fleet. Escalating temperatures associated to global warming will increase the use of air-conditioning (AC) ... -
Thermodynamic modeling and comparative analysis of supercritical carbon dioxide Brayton cycle
(2017)Supercritical CO2 cycles is a promising technology for the next generation power conversion cycles. Supercritical CO2 Brayton cycles offer equivalent or higher cycle efficiency when compared with steam cycles at similar ... -
Vessel's trim optimization using IoT data and machine learning models
(2022)The shipping industry is an important source of greenhouse gas emissions, such as carbon dioxide, methane and nitrogen oxides. In the past few years, environmental and policy reasons dictate the immense reduction of ...